Improvement in snow-plows



A. DAY Snow-Plow.

Patented Oct. 21,1879.

' UNITED STATas jPATENT AUGUSTUS DAY, OF DETROIT, MICHIGAN.

IMPROVEMENT IN SNOW-PLOWS.

Specification forming part of Letters Patent N0. 220,812, dated October21, 1879; application filed Mny 24, 1879.

To all twhom it may concern:

Be it known that I, AUGUSTUS DAY, of Detroit, in the county of Wayne andState ot' Michigan, have invented an Improvement in .Snow-Flows, ofwhich the followingfis a specication. l

The nature of my invention, which is designed as an improvement ontrack-clearers as patented to me May 2S, 1878, relates to certain newand useful improvements in devices for clearing railway-tracks ot' snowand other similar obstacles, by means of which such tracks can bereadily and easily kept free ot' snow for the passage of cars, and atthe same time the space or road-bed between the rails can be cleared,and the snow deposited outside the track.

The invention consists in the peculiar construction of the mold-board oft-he plow, as more fully hereinafter described.

Figure 1 is a -plan view of my improved snow-plow. Fig. 2 is a sideelevation of the same. Fig. 3 is a detached elevation of the mold-boardand its attachments for elevating` or lowering it. Fi'g. et is across-section of the mold-board, showing the different curves on thelines m", w', wz, zu, m, and m5 in Fig. 3.

In the drawings which accompany this and form a part hereof, Arepresents a platform ot' a truck with four wheels, and of theconstruction described and shown in my aforesaid patent.

D is a mold-board, of the form shown in the yarious figures ot' thedrawings 'and in var lng curved lines at different points incrosssection, as shown in Figs.- 3 and 4. This mold-board is supporteddiagonal to and beneath the tloor of the truck by means ofthe shorterdraw-bar, a, and the longer draw-bar, b, both of which are pivotallysecured, as showinone to each side of the platform. The rear/end'srofthese draw-bars are curved to lit the-curvature ofthe mold-board attheir point of contact, and are secured to the Tear and convex side ot'said mold-board, thereby strengthening the same and making the drafteven.

C is a bar secured .,agormy and on a parallel line with the top ci themold-board to the under side of the platform., To this bar, and neareach end thereof, are secured sheaves or pulleys c.

as described, the mold-board is supported at any desired height from thetrack.

1t will be noticed that the mold-board is not a true curve in parallellines in its whole length, but has what I call a torsional twist andprojects some distance on each side of the truck. i

By this construction and manner of attachment the torward-projecting endof the moldboard enters the snow on one side of the truck, and theforward motion of the latter with the diagonal position of themold-board compels the snow to be discharged beyond the track upon theopposite side.

Were the mold-board straight, or nearly so, in cross-section, it wouldpack the snow in front of it, and render great power necessar Y topropel the device.

The peculiar curvature of my incid-board rolls the snow over in itsadvance, and with but little power required compels it to follow thediagonal course of the moldboarl1 to a discharge at the opposite end.

The manner of supporting the scraper from the truck and the means forraising and lowering the same are shown in Patent No. 204,205, grantedto me May 2S, 1878, and are therefore not claimed herein.

l What I claim as my invention, and desire to secure by Letters Patent,is

In a snowplow or track-cleaning device, the mold -board B, constructedwith a convex front face upon varying curved lines in crosssection, asshown and described, and supported beneath and diagonally across theplatform of a truck, substantially as and for the purposes set forth.

AUGUSTUS DAY.

Witnesses:

H. S. Srmtemi, GaAs. THURMAN.

